A slow-release long-lasting super-hydrophobic anti-fouling flashover coating

Abstract

The invention discloses a slow-release type long-acting super-hydrophobic pollution flashover prevention coating. The coating is prepared from the following raw materials in parts by weight: 35-45 parts of terminal hydroxypropyl fluorine-containing polysiloxane, 20-30 parts of terminal hydrogen polysiloxane, 55-65 parts of 107 silicon rubber, 20-30 parts of hydrophobic fumed silica, 3-5 parts of nano zinc oxide, 2-4 parts of oil amino oleate, 4-6 parts of mica powder, 1-3 parts of ketoxime type crosslinking agents, 5-10 parts of dimethyl aminopropyl amine, 1-2 parts of silane coupling agents, 3-6 parts of aluminum hydroxide and 165-175 parts of organic solvents. The slow-release type long-acting super-hydrophobic pollution flashover prevention coating is high in mechanical performance, long in service life which can reach 15 years, high in flame retardancy which can reach FV-0 grade, high in salt fog resistance, high in aging resistance and excellent in stain resistance, and still can exert the effectiveness in weather with haze pollution; the expectant pollution flashover prevention effect can be achieved; the occurrence of pollution flashover accidents is avoided.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a slow-release long-acting super-hydrophobic antifouling flashover coating. Background technique [0002] Pollution flashover accidents involve a wide range of areas, and the power outage lasts for a long time, which seriously threatens the operation safety of power transmission and transformation equipment. Especially in winter, there are thousands of pollution flashover trips in the national power grid, sometimes almost causing the provincial power grid to be disconnected. The anti-fouling flashover measures are nothing more than four main measures: taking measures to adjust creepage, cleaning insulators, using synthetic insulators, and coating RTV paint (room temperature vulcanized silicone rubber). Comprehensive investigation and comparison of the above anti-fouling flashover measures, it can be seen that coating RTV paint is the most economical and effective measure. Espec...

AI Technical Summary

Problems solved by technology

[0003] However, although the introduction of RTV coatings has alleviated the increasingly serious pollution flashover problem in power systems, the performance of current RTV coatings is still low. First, the coatings have weak adhesion, poor wear resistance, and poor corrosion resistance. Due to poor adhesion, In the process of maintenance, the coating is easy to detach due to the action of external force; secondly, due to the problem of its own structure and composition, its own mechanical properties, such as elongation, breaking strength and tear strength are all low, and it is easy to be damaged during actual use. Peeling, cracking, and falling off occur; thirdly, the surface of the current RTV paint is easy to absorb and accumulate dust. When the loose dirt reaches a certain thickness, the inside of the dirt is easy to form water flow channels and large-area stagnation areas, and finally forms flashover channel, leading to the occurrence of pollution flashover events; in addition, because RTV coatings not only have to withstand the effects of electric field and wind force, but also bear the erosion of temperature changes, rain, snow, frost and sunlight, the performance of RTV coatings gradually decreases with time. Small, easy to age and short service life, requires regular maintenance or even re-spraying, which brings great limitations to its use

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